Assessment and retrofitting of existing structures eurocodes. But, the expertise needed is not available in the basic level. Application of repair methods is expected to restore the structures to its preearthquake condition where as application of retrofitting methods to damaged structures is expected to increase strength and ductility of the. Techniques of seismic retrofitting for concrete structures core.
The applications include different types of bridges, buildings, industrial structures, transport structures in urban areas, earth retaining structures and marine structures. Design of structures for earthquake resistance part 3. The increase in concrete confinement and the resulting benefits for member deformation capacity are probably the most important advantages of frp jacketing in repairretrofitting of concrete structures. It addresses in detail specific techniques for the strengthening of traditional constructions, reinforced concrete buildings, bridges and their foundations. Waghmare address for correspondence acharya shrimannarayan polytechnic,piprim, wardha maharashtra abstract seismic protection of buildings is a needbased concept aimed to improve the performance of any structure under future earthquakes. Seismic retrofitting of reinforced concrete structures anju t.
Techniques structural members and of the entire construction. The reduction in loss of lives, damage of the essential facilities and functional continuity of lifespan of structures. To make the students to gain the knowledge on quality of concrete, durability aspects, causes of deterioration, assessment of distressed structures, repairing of structures and demolition procedures. Taking at least, 3 per floor, one per each 400 m2 and total of 9 concrete core samples. This project deals with the inspection and verification of performance of existing structures, selection of the retrofitting methods, choosing the best retrofitting material available and execution for retrofitting. More recently, there has been an increased research attention. Pillai3, muhammed ebrahim4, babitha peter5 1,2,3,4btech students, dept. It has matured in the recent years to a highly reliable technology. The study suggested that jacketing is better for columns but. Retrofitting of concrete structures for shear and flexure with fiberreinforced polymer.
The focus of this manual is the retrofitting of one to fourfamily. Research article materials and jacketing technique for retrofitting of structures shri. A method of seismic retrofitting a concrete structure includes removing material from a portion of the concrete structure by irradiating the portion with a laser beam having a laser energy density. A method of seismic retrofitting a concrete structure 22 includes removing material from a portion of the concrete structure with a laser 30 and positioning a stabilizing structure 56 to provide support for the structure. Strengthening and retrofitting of existing structures. Seismic retrofitting of concrete structures request pdf. This study highlights the principals of assessing and retrofitting of structures against seismic events. Repairretrofitting of concrete structures with fiber. The focus of this manual is on retrofitting buildings that are subject to flooding. Critical remarks increase in the capacities strength, stiffness, ductility, stability and integrity of concrete structure. The retrofitting becomes necessary to enhance the performance of structures including those encountered loss of strength due to deterioration or which have crossed their expected life.
Us7491950b2 method for retrofitting concrete structures. Text books rehabilitation and retrofitting of structures rrs notes pdf rrs pdf notes rrs pdf rrs notes. Some of these methods were practically implemented and. There are various methods of repair and retrofitting for earthquake damaged masonry structures in different categories. Techniques of seismic retrofitting for concrete structures. This guideline presents repair and retrofitting methodologies for reinforced cement concrete buildings. This damage to structures in its turn causes irreparable loss of life with a large number of casualites. Also, changes in service conditions, often made arbitrarily, may lead to substantial changes in the structural behaviour resulting in a degradation of the. Techniques for seismic retrofitting of concrete structures. Design of structures for earthquake assessnlent and retrofitting of buildings, has been prepared by technical. The method further includes positioning a stabilization structure in proximity to the portion of the concrete structure. Ppt on retrofitting concrete beam structure free 30. Research article materials and jacketing technique for. Retrofitting of bridges concrete building engineering.
Retrofitting of concrete structure linkedin slideshare. Conclusion seismic retrofitting techniques for concrete structures. Strengthening and retrofitting of concrete structures. Seismic assessment and retrofit of reinforced concrete buildings, which has been a source document for the european standard. Article pdf available in aci structural journal 994. Rehabilitation and retrofitting of structures notes rrs pdf. Concrete repair and maintenance illustrated, rs means. Wo2003070654a3 method for retrofitting concrete structures. The purpose of this report is to present the process of seismic retrofitting and the characteristics and technical aspects of the major intervention methods for reinforced concrete rc building structures. When retrofitting approach is adopted, retrofitted building can still be operated. Request pdf on jun 1, 2018, anand daftardar and others published seismic retrofitting of concrete structures find, read and cite all the research you need on researchgate. Jacketing of beam jacketing of column it consist of added concrete with longitudinal and transverse reinforcement around the existing column. Hans beushausen is a researcher and lecturer in the fields of structural engineering, construction material technology, structural condition assessment, and concrete repair technology at the university of cape town.
Introduction to retrofitting retrofitting is any change made to an existing structure to reduce or eliminate the possibility of damage to that structure from flooding, erosion, high winds, earthquakes, or other hazards. Retrofitting of concrete structures through externally bonded frps. Retrofitting of rcc structural members, types, selection, and. For earthquake damaged houses that needs to be repaired and retrofitted under. Strengthening and retrofitting of concrete structures page 3 of 4 course convenor prof. Pdf retrofitting of concrete structures for shear and flexure with. Retrofitting will involve relatively less resources, either human resources or natural resources. Repair and retrofitting of deteriorated reinforced concrete structures three case studies vol. The manual presents various retrofitting measures that provide. A vast number of tests on both concrete specimens and reinforced concrete members has demonstrated that confinement influences many aspects of. Seismic retrofitting techniques for concrete structures. Papanicolaou and others published trm as strengthening and seismic retrofitting material of concrete structures find, read and cite all the research you need. Local retrofitting the retrofitting in which we use to repair only the structural elements is called local retrofitting.
Thegrantdistributionprocessis presentedonflowchartbelow. The objective of this research is to evaluate the effects of different retrofit applications on the global response of shortspanned reinforced concrete bridges. Engineering principles and practices for retrofitting floodprone residential structures. Recent advancement are made in the retrofitting techniques to enhance the characteristics like safety, serviceability and restorability of the structure which are susceptible to damage. Introduction of retrofitting building the aftermath of an earthquake maneifests great devastation due to unpredicted seismic motion striking extensive damage to innumerable buildings varying degree i. Seismic retrofitting of reinforced concrete buildings using traditional and innovative. Figure 14 addition of buttress in masonry structure. Decrease the working space of concrete structure due to extension in structural elements and affect. Retrofitting is the seismic strengthening of existing damaged or undamaged structures. Seismic retrofitting of reinforced concrete buildings using. The retrofitting process shall start with investigation and diagnosis of cracks and then applying suitable retrofitting technique and compatible materials.
Retrofitting reduces the vulnerability of damage of an existing structure during a near future seismic activity. Once the decision is made, seismic retrofitting can be performed through several methods with various objectives such as increasing the load, deformation. Effects of retrofitting applications on reinforced concrete. Pdf predisaster preparedness strategies lead to repairretrofitting of reinforced concrete structures for ensuring satisfactory performance during. Retrofitting of concrete structures by externally bonded frps, with emphasis on seismic applications pdf fib bulletins n 35. To determine seismic performance of buildings under a. Technical report 220 pages, isbn 9782883940758, april 2006 pdf format. It is an improvement over the original strength when the evaluation of the building indicates that the strength available before the damage walls insufficient and restoration alone will not be adequate in future quakes. Seismic retrofitting of reinforced concrete structures. Methodology retrofit in structures is done to increase the survivability functionality. Repair and retrofitting of deteriorated reinforced concrete. This book presents the fundamentals of strengthening and retrofitting approaches, solutions and technologies for existing structures. Retrofitting of concrete structures by externally bonded frps, with emphasis on seismic applications. In repairing deteriorated concrete bridges the preliminary objective is to restore structure to its original shape.
The proposed technique consists of applying glass fiber composite laminates gfcl to the bottom surface and sides of the concrete beam to increase its stiffness and flexural strength. Seismic retrofitting is a suitable technology for protection of a variety of structures. Retrofitting of bridges free download as powerpoint presentation. Retrofitting of concrete course documentation structures. Retrofitting will take relatively less construction cost with the same structural performance achievement. Pdf seismic retrofitting techniques for concrete structures. In addition, selected examples for which retrofitting techniques have been applied are presented. Trm as strengthening and seismic retrofitting material of. Nondestructive evaluation of concrete structures by bungey 4. Level of intervention gon home owner beneficiary agreement for repair and retrofit first tranche nrs. In recent years, there is a significant improvement of retrofitting techniques.
934 862 225 839 1272 223 1352 782 535 46 1519 1205 841 1543 922 12 1562 969 342 1110 1177 405 271 660 1481 1008 102 695 680 846 253